In the latest round of a heated dispute between McCarthy Building Cos. Inc. and the owner of the distressed McGuire Apartments, a 25-story tower in Seattle, the St. Louis-based contractor maintains the concrete frame’s corroding post-tensioned slab system can be fixed for less than $2 million. McCarthy calls the local owner’s refusal to make “simple” repairs, its ejection of tenants and its proposed dismantling of the nine-year-old building “irresponsible acts.” + Image Image: Whitlock Dalrymple Poston & Associates Pitting Contractor’s summary of pitting corrosion on tendons of 25-story building’s post-tensioning. Photo: Whitlock Dalrymple Poston & Associates Samples Tendon failure tests
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.